NEC 78K0 User Manual page 106

WR
PU
RD
WR
PORT
WR
PM
PU1: Pull-up resistor option register 1
PM1: Port mode register 1
RD: Read signal
WR××: Write signal
106
CHAPTER 4 PORT FUNCTIONS
Figure 4-9. Block Diagram of P13
PU1
PU13
Output latch
(P13)
PM1
PM13
Alternate
function
User's Manual U15947EJ2V0UD
*
EV
DD
P-ch
P13/TxD6